I had a line check recently. The LCA told me they no longer require you to ride along on the first couple of legs. Anyway, I had a 4 day trip recently that had OE on it. They called me about 7 am the morning prior to remove me from the trip. My trip didn't report until the next evening. So I had a 30 plus hour heads up. At 12 hours prior, there was nothing on my schedule so I was free of obligation. It is not 23K stuff. This falls under 23G. They can only give you something on the first day after white slips. Make sure to put in preference qualifiers. I chose the shortest trip possible. Why work more when you will get paid for the original trip anyway? You are not officially notified until they call you. I had to go into Icrew to acknowledge that the rotation was removed.